Motor components
5.4 Gearbox
1FT7 Synchronous Motors
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
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Benefits
● High efficiency; single-stage: > 97 %, 2-stage: > 94 %
● Minimal torsional backlash; single-stage: ≤ 4 arcmin, 2-stage: ≤ 6 arcmin
● Power transmission from the central sun wheel via planet wheels
● No shaft deflections in the planet wheel set due to symmetrical force distribution
● Very low moment of inertia and thus short acceleration times of the motors
● The gearboxes are connected to the motor shaft via an integrated clamping hub A plain
motor shaft end is necessary for this purpose. Shaft and flange accuracy tolerance N in
accordance with DIN42955 and vibration magnitude grade A in accordance with EN
60034-14 are sufficient. The motor flange is adapted by means of adapter plates.
● Output shaft of gearbox exactly coaxial with the motor
● The gearboxes are sealed (seal between the gearbox and motor) and filled with oil at the
factory. They are lubricated and sealed for their service life. The gearboxes are suitable
for all mounting positions.
● Degree of protection of gearbox: IP65
● Small dimensions
● Low weight
Integration
The gearboxes assigned to the individual motors and the gear ratios available for these
motor/gearbox combinations are listed in the selection table below. When making a
selection, the maximum permissible input speed of the gearbox must be observed (this is the
same as the maximum motor speed).
The motor/gearbox combinations listed in the selection tables below are mainly intended for
cyclic operation S3 - 60% (ON period ≤ 60% and ≤ 20 min). Reduced maximum motor
speeds and output torques apply for use in S1 continuous duty (ON period > 60% or > 20
min). The gearbox temperature may not exceed 90 °C
1FT7 motors to be implemented as follows for mounting to a gearbox:
● Flange "1"
● Plain motor shaft extension
● Shaft and flange accuracy tolerance N
● Vibration severity grade A
● IP65 degree of protection
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